I've seen two other discussions on this, but those are closed.
I think I've resolved this issue. I have had the issue for months. Each time I open Quicken, it is on an old transaction. Then I have to hit Home to bounce to the top, or scroll around to find where I want to be.
To fix, instead of pressing CMD-Q to quit Quicken, I just closed it by clicking the red X in the upper-left corner.
When I did this, I noticed for the first time that were two other windows open that I was never seeing any other way. Apparently one of those windows was doing something with that old transaction.
So I closed both of those, then re-opened Quicken - All Good.
Then I pressed CMD-Q to quit Quicken. Reopened again - All Good.